Please introduce the following article in English and write the main idea of the paragraph.

Writing ideas: according to the requirements of the topic, write a short story starting with one of the sentence patterns, and be vivid when writing.

Text:

A long time ago, there were some animals on the boat.

The animals were too heavy and the ship began to sink. ?

A long time ago, there were some animals on the boat. The animals were too heavy and the ship began to sink.

"We must do something before the ship sinks," said the dog. "Some of us?

You must jump into the sea, so as to reduce the burden on the ship. " ?

"We must do something before the ship sinks," said the dog. "Some of us must jump into the sea to lighten the ship's burden."

"Well, then I propose that everyone tell a joke." Go on.

"If everyone laughs, can the cat's body be maintained?

Boat, but as long as a person doesn't laugh, he has to jump into the water. " ?

"Well, I suggest you tell a joke," continued the cat. "If everyone laughs, then this person can stay in the boat, but as long as one person doesn't laugh, he must jump into the water."

Then, everyone agrees with this clever suggestion. The sheep told a joke first, and then what?

Everyone laughed, except the pig, who seemed to be thinking about something.

Then, everyone agreed with this wise suggestion. The sheep told a joke first, and everyone laughed, but the pig didn't laugh, as if thinking something.

The sheep jumped into the sea reluctantly. After that, the bull told a joke.

Nobody laughed, which is not funny at all. ?

The sheep jumped into the sea reluctantly. Then the bull told a joke, which was not funny at all, and no one laughed.

But just as the bull was about to jump into the sea, the pig burst out laughing.

Crying, "I already understand! I already understand! The jokes told by the sheep are so funny! "

But just as the bull was about to jump into the sea, the pig suddenly smiled and shouted, "I see!" I see! The jokes told by the sheep are really interesting! "